Flying cutting device



13, 1940- K. w. HALLDEN 2,211,418

FLYING CUTTING DEVICE Filed Nov. 13, 1939 2 Sheets-Sheet 2 5b l/b /8 [/8 47 56 505/ Patented Aug. 13, 1940 UNITED STATES PATENT OFFICE 2,211,418 FLYING CUTTING nnvron Karl w. Hallden, Thomaston, Conn. Application November 13, 1939, Serial No. 303,992

6 Claims.

This invention relates to improvements in flying cutting devices, and more particularly to rotary flying cutting devices having means for synchronizing the speed of the cutters with the speed of the stock, at the time of cut.

One object of this invention is to provide. an improved rotary flying cutting device adapted to be adjusted so that stock can be cut into any of various lengths while the stock is being fed, with means for synchronizing the speed of travel of the cutters with the speed of feed of the stock at the time of cut, together with counterbalancewhen employing mechanism of the type set forth in the drawings,'it is necessary to introduce a greater or less degree of surge or variable-angular-velocity in the cutter-carriers, with consequent strains and stresses in the mechanism due 5 v to this non-uniform or irregular motion. It is an object of the present invention to counteract this surge of the cutter-carriers by producing a surge of opposite character in a counterbalancemeans to counterbalance any surge that may be present in the cutter-carriers.

With the above and other objects in view, as will appear to those skilled inthe art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawings forming part of the present disclosure, in which certain ways of carrying out the invention are shown for illustrative purposes:

Fig. l is a schematic plan view, partly in section, illustrating one embodiment of the invention in the form of a counterbalanced synchronous rotary flying shear;

Fig. 2 is a sectional view on line 2-2 of Fig. 1;

Fig. 3 is a fragmental sectional view on line 3-3 of Fig. 1; and

Fig. 4 is a schematic plan view, partly in section, of a modified form of the invention.

In the description and claims, the various parts are identified byspecific names for convenience, but they are intended to be as generic in their application as the prior art will permit.

In order-to be able to cut stock into any of various desired lengths while it is being fed without interruption, it is necessary to be able to vary the speed of rotation of the cutters, or the speed of rotation of the feed-rolls or the speed of rotation of both the cutters and the feed-rolls. In-

the particular embodiments of the invention illustrated in the drawings, the speed ofgthe feed-rolls is varied in order to accomplish cuts of different lengths while the stock is being fed. But regardless of which method is used for securing variations in the length of stock being cut, it is important to provide adjustable means so that the speed of travel of the cutters or cutter-means can be synchronized or made the same as the speed of feed. of the stock at the instant of cut.

In-order to bring about the proper synchronization of the speed of travel of the cutters with the 55 speed of feed of the stock at the instant of cut,

means so that the surge of the latter tends to 10 nullify the harmful effects of the surge of the former.

Referring to the particular embodiment of the invention illustrated in Figs. 1, 2 and 3 of the drawings, the electric motor l0 through gears ll '15 and I2 and cone pulleys l3 and I 4 and belt l5, drives the feed-mils l6 (only one of which is here shown) to feed the stock to be cut, to'the cutterrolls or cutter-carriers l'l, each of which is provided with a cutter or cutter-blade I8.

' The motor Ill drives the cutter-carriers il' through the gears II and I9, a primary drivingshaft 20 having secured thereon a crank-arm 2i which has a radial slot 22 in which rides a roller 23 pivotally mounted on a stud-shaft 24 secured 25 in a crank-arm 25 which in turn is secured on a secondary driving-shaft or ofiset-shaft 26, the other end of which shaft 26 has secured thereto a second crank-arm 21 carrying a stud-shaft 28 on which is rotatably mounted a roller 29 which rides in a radial slot 30 of a crank-arm 3| which is secured upon a driven-shaft or shaft-extension 32 of one of the cutter-carriers l'l.

Similarly, the primary driving-shaft 20 has secured to its other end, a crank-arm 33 which has a radial slot 34 in which rides a roller 35 ro- 35 tatably mounted on a stud-shaft 36 secured in a crank-arm 3'! which in turn is secured to a secondary driving-shaft or, oflset-shaft 38, the other end of the oiTset-shaft 38 having another crankarni 39 secured thereto and carrying a stud-shaft 40 on which is rotatably mounteda roller 4! which rides in a radial slot 42 of a crank-arm 43 secured on a driven-shaft 44, on the other end of which is secured a counterbalance-means in the form of a wheel 45.

Each of the ofiset-shafts 26 and 38 is mounted in a bearing 46 mounted to be adjusted horizontally inguideways in the base or frame 41 by means of a screw-shaft 48 swiveled to the bearing 5b 46 at 49 and provided with screw-threads 50 threaded-1y engaging the threaded bushing 5| which latter is fixedly secured in the base 41. The outer end! of each screw-shaft 48 is keyed to a worm -wheel 52 which is rotatable by a worm 53 55 wheel 66. The upper portion of theconstruction of Fig. 3 (not shown) may be made in any suitable way, as for example in the way shown in Figs. 2 and 3 of the Patent #2067513 granted on January 12, 1937 to Howard H. Talbot.

It will be observed that by rotating the handwheel 66 in one direction that the bearings '46 carrying the two offset-shafts 26 and 36 will be moved in a direction to offset both of these shafts a still greater amount from the axis of shafts 28, 32 and 66, or if the hand-wheel 56 is rotatedin the opposite direction, the shafts 26 and 36 will be adjusted back toward the axis of the shafts 26, 32 and 44, and continued rotation of the handwheel 66 in such direction will actually align the shafts 26 and 38 with the other three shafts, and still further continued movement of the rotation of the hand-wheel 66 in such direction will adjust the shafts 26 and 38 to the opposite side of the axis of the shafts 26, 32 and 44. During any such adjustment of the shafts 26 and 38, the rollers 23, 29, 36 and 4| move correspondingly along the slots in the respective crank-arms with which they engage.

The gear I! and primary driving-shaft 26 are driven at uniform-angular-velocity by the motor Hi. When the shaft 26 is aligned with the shafts 26 and 32 then the uniform-angular-velocity is transmitted to the cutter-carriers H, which latter are geared together so that one drives the other, in a usual manner. But when the shaft 26 is adjusted in either direction to offset it from the axis of the shafts 20 and 32, then the uniform-angular-velocity of the shaft 26 is changed to a non-uniforn:-angular-velocity of the shaft 32 and the cutter-carriers 1] and cutters I8 driven thereby. The average-angular-velocity of the shaft 32 remains the same as the average-angular-velocity of the shaft20 but at one part of the rotation of the shaft 32 the latter has a lesser angular-velocity than the shaft 26 while at another portion of rotation of the shaft 32 the latter has a higher angular-velocity than the shaft 20. Thus, by suitable adjustment of the shaft 26, it is possible to introduce a suitable degree of surge into the cutter-carriers Hand the cutters carried thereby, so that at the instant of cut, the cutters will be travelling at the same speed as the speed of feed of the stock which is being fed by the feed-rolls I 6, in order that the speed of travel of the cutters may thus be synchronized with the speed of feed of the stock at the instant of cut.

The non-uniform-angular-velocity or surge which is thus introduced into the cutter-carriers owing to the heavy weight of the latter, brings about undesirable stresses and strains in the mechanism which reduce the life and accuracy of the machine. It is for this reason that the counterbalance-means before described, is connected with the cutter-carriers I! so that at all times, for any adjustments of the shafts 26 and 38, a non-uniform motion or surge of opposite character to that of the cutter-carrier means is introduced into the counterbalance-means 46. In other words, when the cutter-carrier means is accelerating, the counterbalance-means is decelerating, and vice versa, and in equal degree. This non-uniform motion of the counterbalancemeans 46 is of opposite character to that of the cutter-carrier means I! because the pair of crank-arms 2|, 26 extends oppositely to the pair of crank-arms 33, 31, and the pair of crank-arms 21, 3| extends oppositely to arms 39, 43.

In the form of the invention illustrated in Fig. 4, the electric motor 66 could drive feed-rolls (not shown) in a similar manner to that illustrated in Fig. 1, through mechanism including gears 61 and 66.

The motor 66 drives the cutter-carriers 69 through the gears 61 and 66, an offsetor drivingshaft 6| having secured thereon a crank-arm 62 which has a radial-slot 63 in which rides a roller 64 pivotally mounted on a stud 66, which latter is secured in a crank-arm 66 which, in turn, is secured to the driven-shaft 61, the other of which shaft 61 has secured thereto a friction-clutch member or element 66 adapted to be frlctionally engaged with a complemental friction-clutch member 69, which latter is secured on a shaft or shaft-extension 10 of one of the cutter-carriers 69, only one of which cutter-carriers 59 is shown, as they are the same as the cutter-carriers H. The friction-clutch members or elements 68 and 68 are adapted to be adjusted rotationally with respect to one another and secured together in any of such relative rotational positions for a purpose to be later explained.

Similarly, the offsetor driving-shaft 6| has secured on the other end thereof, a crank-arm 1| which has a radial slot 12 in which rides a roller 13 rotatably mounted on a stud-shaft 14 secured in a crank-arm 16 which, in turn, is secured to a driven-shaft 16, the other end of the shaft 16 having secured thereon a counterbalance-means in the form of a wheel ll.

The uniform speed of rotation of the shaft 6| produced by the motor 66 acts through the pair of crank-arms 62 and 66 to give a non-uniform rotation or surge to the shaft 16 and the cutter-carriers 63, while the oppositely-disposed pair of crank-arms H and 15 give a non-uniform rotation or surge of opposite character to the counterbalance-wheel '11. In other words, when the cutter-carrier means is accelerating, the counterbalance-means is decelerating and vice Vera, and in equal degree. In a construction such as is illustrated in Fig. 4, in which the offset-shaft 6| does not have its degree of offset ad- Justable, the degree and character of surge introduced into the cutter-carriers and counterbalance-wheel is of a fixed type. But by means of the clutch elements 68, 69 it is possible to introduce a rotational adjustment between the elements 68 and 69 so that, in one adjusted position, for example, the cutters 18 of the cutter-carriers 69 will come together in cutting position, say at the point of maximum surge, in order to accomplish synchronization with ,a given rate of feed of the stock to be cut, whereas other rotational adjustments of the clutch parts 68 and 68 Will bring the cutters into cutting relation at lesser rates of surge. By suitably adjusting the clutch elements 68, 69 rotationally relative to one another, any desired necessary speed of surge at the instant of out can be obtained in order to synchronize the speed of travel of the cutters with the speed of feed of the stock at the instant of cut. And the pair of crank-arms ll, 15 imparts a non-uniform motion or surge of opposite character to the counterbalance-wheel 11.

The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all the pair of crankrespects as illustrative and not restrictive, and n means with the speed of feed of the stock, at the all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

1. A flying cutting device, comprising: rotatably-mounted cutter-carrier means provided with cutter-means; feed-means adapted to feed stock to said cutter-means; driving-means for driving said cutter-carrier means and said feed-means .to cause said cutter-means to out said stock while it is being fed; said driving-means including speed-changing means for changing the average relative speeds of the feed-means and cuttermeans and including angular-velocity-varying means adapted to cause said cutter-carrier means to be rotated with a non-uniform motion to permit of synchronizing the speed 01' travel of the cutter-means with the speed of feed of the stock, at the time of cut; counterbalancemeans; and other angular-velocity-varying means interconnecting said cutter-carrier means and said counterbalance-means and adapted to cause said counterbalance-means to rotate with a non-uniform motion of opposite character to that of the cutter-carrier means; one of said angular-velocity-varying means including offset drivingand driven-shafts, each said shaft having a crank-arm, and said crank-arms being so engaged with one another that 'the driven-shaft is rotated with a non-uniform motion.

, 2. A flying cutting device, comprising: rotatably-mounted cutter-carrier means provided with cutter-means; feed-means adapted to feed stock to said cutter-means; driving-means for driving said cutter-carrier means and said teed-means to cause said cutter-means to cut said stock while it is being fed; said driving-means including speed-changing means for changingthe average relative speeds of the feed-means and cuttermeans and including anguiar-velocity-varying means adapted to cause said cutter-carrier means to be rotated with a non-uniform motion to permit of synchronizing the speed of travel of the cutter-means with the speed of feed of the stock,

at the time of cut; counterbalance-means; andother angular-velocity-varying means interconnecting said cutter-carrier means and said counterbalance-means and adapted to cause said counterbalance-means to rotate with a non-uniform motion of opposite character to that of the cutter-carrier means; the angular-velocity= varying means including a driving-shaft oflset from and intermediate of two driven-shafts, thedriven-shaits respectively driving the cutter-carrier means and the counterbalance-means; said drivingand driven-shafts having crank-arms such that the driving-shaft has a crank-arm so engaged with a crank-arm on each driven-shaft that each driven-shaft is rotated with a non-unii'orm motion of opposite character to the nonuniform motion of the other driven-shaft.

3. A flying cutting-device, comprising: rotatably-mounted cutter-carrier means provided with cutter-means; feed-means adapted to feed stock to said cutter-means; driving-means for driving said cutter-carrier means and said feed-means to cause said cutter-means to cut said stock while it is being fed; said driving-means including speedchanging means for changing the average relative speeds of the feed-means and cutter-means and including, angular-velocity-v ryinz means adapted to cause said cutter-carrier means to be rotated with a non-uniform motion to permit of synchronizing the speed 01' travel 01 the cuttertime of cut; counterbalance-means; and other angular-velocity-varying means interconnecting said cutter-carrier means and said counterbalance-means and adapted to cause said counterbalance-means to rotate with a non-uniform motion of opposite character to that of the cuttercarrier means; one of the said angular-velocityvarying means including otIset drivingand driven-shafts, each said shaft having a crankarm, and said crank-arms being so engaged with one another that the driven-shaft is rotated with a non-uniform motion; and adjustable couplingmeans for changing the angular relationship between said cutter-carrier means and said firstmentioned angular-velocity-varying means.

4. A flying cutting device, comprising: rotatably-mounted cutter-carrier'means provided with cutter-means; reed-means adapted to feed stock to said cutter-means; driving-means for driving said cutter-carrier means and said feed-- means to cause said cutter-means to cut said stock while it is being fed; said driving-means including speed-changing means for changingthe average relative speeds of the feed-means and cutter-means and including angular-velocity-varying means adapted to cause said cut-' ter-carrier means to be rotated with a non-uniform motion to permit of synchronizing the speed of travel of the cutter-means with the speed of feed of the stock, at the time oi cut; counterbalance-means; and other angular-velocity-varying means interconnecting said cutter-carrier means and said counterbalance-means. and adapted to cause said counterbalance-means to rotate with a non-uniform motion of opposite character to that of the cutter-carrier means; the angular-velocity-varying means including a driving-shaft oflset from and intermediate 01 two driven-shafts, the driven shafts respectively driving the eutter-can'ier means and the counterbalance-means; said drivingand drivenshafts having crank-arms suchgthat the drivingshaft has a crank-arm so engaged with a crankarmon each driven-shaft that each driven-shatt is rotated with a non-uniform motion of oppositeit is being fed; said driving-means including speed-changing means for changing the average relative speeds of the reed-means and cuttermeans and including angular-Welocity-varying means adapted to cause said cutter-carrier means to be rotated with a non-uniform motion to permit of synchronizing the speed of travel of the cutter-means with the speed of feed of the stock, at the time of cut; counterbalance-means; and

other angular-velocity-varying means interconnecting said cutter-carrier means and said counterbalance-means and adapted to cause said counterbalance-means to rotate with a non-uni-- form motion of opposite character to that of the cutter-carrier means; one of said angular-velocity-varying means including ofl'set drivingand driven-shafts, each said shaft having a crank-arm, and said crank-arms being so engaged with one another that the driven-shaft is rotated with a non-uniform motion, and one of said offset shafts being adiustable to increase or decrease its degree of oflset relatively to the 10 stock to said cutter-means; driving-means for driving said cutter-carrier means and said feedmeans to cause said cutter-means to out said "stock while it is being fed; said driving-means including speed-changing means for changing the average relative speeds of the teed-means and cutter-means and including angular-velocityvarying means adapted to cause said cutter carrier means to be rotated with a non-uniform motion to permit or synchronizing the speed of 20 travel of the cutter-means with the speed of feed of the stock, at the time of cut; counterbalancemeans; and other angular-velocity-varying means interconecting said cutter-carrier means and said counterbalance-means and adapted to cause said counterbalance-means to rotate with a non-uniijorm motion of opposite character to that of the cutter-carrier means; the angularvelocity-varying means including two drivenshaits respectively driving the cutter-carrier means and the counterbalance-means, two shafts respectively oflset from and for driving the respective driven-shafts, a primary driving-shaft intermediate or and for driving said oflset shafts, four pairs of crank-arms, one pair of which crank-arms is. between and in driving relation with each two adjacent shafts, the crank-arms of each pair being so engaged with'one another that each driven-shaft is rotated with a non-uniform motion of opposite character to the non-uniform motion of the other driven-shaft, and the Meet shafts.

KARL W. HALLDEN. 

